Chaeles c



(No Model.) f v C. C. HARTUNG.

SELF CLOSING HVATGHWAY.

N. mens. Pw uw r. vla-Mm ne.

IOV

" UNITED STATES PATENT OFFICE.

CHARLES C. HARTUNG, OF ST, LOUIS, MISSOURI.

SELFeCLOSING HATCHWAY.

SPECIFICATION forming part of Letters Ratent No. 290,048, dated December 11, 1883'. Application led April 3, 1883. (No model.)

To all whom it may concern.'

Beit known that I, CHARLES C. HAETUNG, of the city of St. Louis, in the State of Missouri, have invented a certain new and useful Improvement in Self-Closing Hatchways, of which the following is a full, clear, and eXact description, reference being had to the accompanying drawings, forming part of this specification, and in which- Figures 1 and 2 are vertical sections taken on line l 2, Fig. 3, showing the cage in different positions. Fig. 3 is a top View. Fig. 4 is a horizontal section taken on Vline 4 4, Fig. 3.

My invention relates to a self-closing hatchway wherein the doors are opened and closed horizontally by racks on the cage; and my invention' consists in points of novelty hereinafter fully described, and pointed out in the claim.

Referring to the drawings, A represents the elevator-cage, to the bottom of which is secured a downwardly-projecting rack, B, and to the top of which an upwardly-projecting rack, C, each provided with cogs, as shown.

These racks, as the elevator-cage ascends andy descends, engage with and turn a cog-wheel, D, on a short horizontal shaft, E, journaled near or beneath each iioor of the building.

On the other end of the shaft E is a chainwheel, F, connecting with a similar wheel, G, by a suitable belt, G, on the end of a horizontal shaft, H, journaled beneath the floor. On this shaft vare two cog-wheels, I I, rigidly secured thereto.

J represents the door of the hatchway, beneath which are secured two cog-racks, K K, which engage with the wheels I I on the shaft H. y The door preferably opens beneath a covering, L, as shown. It will thus be understood that as the cage ascendsvthe rack C will engage the cog-wheel D, and by turning it will open the door, l(through means of the connection described,) and then as the cage continues to ascend the rack B will engage with the cog-wheelD, and by turning it in the opposite direction (it engages with the other side of the wheel from that C, as shown) closing thel door. In like manner, when the cage descends, the rack B will open and the rack C lclosethe door. l If desired, the shaft H may carry more or less wheels I than two, as stated, and the door be provided with a correspending number of racks, K, and, if desired, the door may be made in two parts, each part being provided with racks to engage with the wheels on the shaft H. The forward part of the door has aslot, M, to receive the hoistingcable. obtained by the number of cogs on the racks B C.

My improved hatch-closer may be applied to shafts of dumb-waiters, if desired.

Instead of the chain-wheels F and G, and a chain-belt, G', a plain belt and pulleys may be used.

I claim as my invention- The required movement of the door is In a hatch-closer, the combination of a cage y other end, horizontal shaft H, having cogwheel I secured thereto, and carrying a chainwheel, G, at one'end, chain G, connecting the chain-Wheels, and door J, having a rack, H, traveling on the cog-wheel I, as set forth.

\ GHAS. C. HARTUNG.

Witnesses:

SAML. KNIGHT,

GEO. H. KNIGHT.. 

